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TNY267P Datasheet(PDF) 10 Page - Power Integrations, Inc. |
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TNY267P Datasheet(HTML) 10 Page - Power Integrations, Inc. |
10 / 24 page 10 E 4/04 TNY263-268 Key Application Considerations TinySwitch-II vs. TinySwitch Table 2 compares the features and performance differences between the TNY254 device of the TinySwitch family with the TinySwitch-II family of devices. Many of the new features eliminate the need for or reduce the cost of circuit components. Other features simplify the design and enhance performance. Table 2. Comparison Between TinySwitch and TinySwitch-II. *Not available. ** See typical performance curves. Function TinySwitch TinySwitch-II TinySwitch-II Advantages TNY254 TNY263-268 Switching Frequency 44 kHz ±10% (@25 °C) 132 kHz ±6% (@25 °C) • Smaller transformer for low cost and Tolerance • Ease of design Temperature Variation +8% +2% • Manufacturability (0 - 100 °C)** • Optimum design for lower cost Active Frequency Jitter N/A* ±4 kHz • Lower EMI minimizing filter component costs Transformer N/A* Yes - built into • Practically eliminates audible noise Audible Noise controller with ordinary dip varnished Reduction transformer – no special construction or gluing required Line UV Detect N/A* Single resistor • Prevents power on/off glitches programmable Current Limit Tolerance ± 11% (@25 °C) ± 7% (@25 °C) • Increases power capability and Temperature Variation -8% 0% simplifies design for high volume (0 - 100 °C)** manufacturing Auto-Restart N/A* 6% effective on-time • Limits output short-circuit current to less than full load current - No output diode size penalty. • Protects load in open loop fault conditions - No additional components required BYPASS Pin N/A* Internally clamped to • Allows TinySwitch-II to be powered Zener Clamp 6.3 V from a low voltage bias winding to improve efficiency and to reduce on-chip power dissipation DRAIN Creepage at 0.037” / 0.94 mm 0.137” / 3.48 mm • Greater immunity to arcing as a Package result of dust, debris or other contaminants build-up Design Output Power Table 1 (front page) shows the practical maximum continuous output power levels that can be obtained under the following conditions: 1. The minimum DC input voltage is 90 V or higher for 85 VAC input, or 240 V or higher for 230 VAC input or 115 VAC input with a voltage doubler. This corresponds to a filter capacitor of 3 µF/W for universal input and 1 µF/W for 230 VAC or 115 VAC with doubler input. |
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